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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b065ce2bcc8d350b0eb4510808c7ad5800adf32759820ffcdb1b7b684bd91e93' 
  AND token = 'NNzGTpL9zEZHRc+tdvFOPRP3pzxTdtVXST3Em1f8Gg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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