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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93981fcc453e02382549252858550ae02eea6e47055f312a47272557b1221e1e' 
  AND token = 'EzsbyrvA3JLkw00Gj8hvIAZUuhL0MYOK3rWmFl1lQnY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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