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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '98c65605bb84d02f65425ae6dafcf2b0be2f1e0618514d5bcf5e6a5d21ea6443' 
  AND token = 'hCFh1q1HSnnAlUAwXiS0lPY8KtZVO3dFhIuSEussIwQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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