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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bbc50aab900cc7219ad9c25f8261c377411c7686a7765aef8be0b47f9eede65' 
  AND token = 'h+lJqx/lDHHNSIaWk3+Mv+GjEESEszdGCgBF4tE+yE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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