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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '658a172542fbae607cb0066d9bbbc453a2a71f6a0d3ca8f842aba6ea448da312' 
  AND token = 'HcoZaL6i2PdoJplA4OAKk0eqKBcZF6/Cgu6FjvhPoXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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