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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0914d0d6dd6872ffe7537f8aca9e3c2b8dad8b85732dd69e1a7bc4ebb40bf04d' 
  AND token = 'dlsAMf1dancpeZlpwq3PFIjUCfRX4hYhcKTsV2VMf68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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