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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e6832b534d4fa524b6da00955cbe13ce153c7a0a2d270598a2f055fb9c7706e' 
  AND token = 'yHDBx5Zkn8dIZlDCQd/Rcpu891TwAe7GE2UUW1SlnxQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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