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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dfcdd29b676bed9cfcbd0bc9e5665f243cc6f721dec8defa4d153aaafa89550e' 
  AND token = 'VXMI3NL60kkgz8GE6h1wke7qLXvaubTn58sUMKS6g/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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