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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb24d7e3b05b9c9577a020d4207501f7dc435173176275d621a422d6b6c2cfd8' 
  AND token = '/i6/k7Qa5KX6/5Sm77tvME9v0TxlC2SLbWT4r4mKcPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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