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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2c67d86fbff25c65c4fc3ed6802cef6a8f499762182f1697c41988ca4bef5131' 
  AND token = '092f0+c+yM7pt+Fp5du5uX3w41UX/eZ05VxMvDdP+pY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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