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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbcb3edde79b209705c21ecb823f8ebff11437a293446a3ea286b1969579a004' 
  AND token = 'G8WawdiJKUjDXpwfC2GMx61xwMzxbwOdHnS6H+t+/es=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}