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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4aa3f84268f6f1a99d34e4e60e1f124daf6436b5b46dab18d8bc5fb8ed858cf2' 
  AND token = 'A5qjHEPLz+hCKyMOWdB1I1Jd0txgxuNpiDNSPcHb+Cs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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