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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd7bc3a3be3ccb67c297a46204a69b9a3043011cb6c26494b51224046d55cdbc5' 
  AND token = 'PhFKG6IyIkkMn4OxIgd7X7XYyyDGeqCNwkfMnAn7r9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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