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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '072ba4d0fc90e171da23493608b5cc5fa9938e4188f9bb5efcffae7ddf636170' 
  AND token = 'loUJ8eqppIWoTP+001e53bouA6r+e/zjGIsYJMRFef0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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