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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cd1355030a54504300114df49af4d40efd3e67f0b905bba3626b776377fbaf4d' 
  AND token = 'QhggkF7XOTtvfvxbuJtgQvr4Cxnr4Kqc8J9SiYw15cI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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