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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c00078dd74164fc002265fefd9cebc50ddcd9396527dc75133f55cebcdd454e0' 
  AND token = '/W53O931THR155n6GA/h5Ia9ZqvWjKeqWPgCxgyWKM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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