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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '004f6b41078e88c2d02a1fa3244bc0deb7e02d50aed2f94c3fc724b37145e6ef' 
  AND token = 'hOg0FJvFmNr9W5gwz/92/SMzxbyfhk4CxM2vopi8WAY=' 
  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"
    }
  }
}