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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11ce6ff32732435c7e81a0e12b4582096b35ac570e10e3b844cf6be42f4893de' 
  AND token = 'S5J6k5snfsRJFt2SDTT9OqQAH9xNPoEQPJV+n1BPBwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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