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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3b6e4bacec8f7724530cff4418838b154546c5df689b48679523fd2ca5104ea' 
  AND token = '3cMMH5HV6Sb6l8EUILEX3TacLoFLgh5nxsAUUsxOClI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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