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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd1ecdcbe9d843afb1eabefa2bcbbb8314f86305e5465baf9d90c2fa29ea52d15' 
  AND token = 'AX58nHgHmcc0ynsA5o3LlssqNks5byKD+yDv+VfGI5A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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