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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9653ee5f39c0b32844181043e3f8c936ace58c62d41ccd5ce6d2d35506d763d9' 
  AND token = 'I8aST+SxkDB9JM2g4W55ISRxet224JRxDZHi8bfoaqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}