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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3898f5b06810708acc0dfe05c9f2bbb34250b53ab0bd77e6cd3353dcec5473f' 
  AND token = 'faMHN38rr59UIdGhbhH8fh4ICtci0QEWAjrtD/Q2vK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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