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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab6b943743179b0aa92bfacf6609aaf66ddc0e505c2e469c639d3a0f5767e6b7' 
  AND token = 'VQVS1SFgEf8XJJTgoT2wCJgLvoSmjGX1T/1QxaMk8DE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00263

JSON explain

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