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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dddaaba2415802bae7dc9c935def6a3784c43366dd9683413ac0c8c7923bdd2c' 
  AND token = 'ZoDiH0V6eeYqYYsi8QA4hcxpuVpE0s48O+cFOO9/lb0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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