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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1dd96381f1072b735298541080524f267a86bae639e8cb3e8f88006b7527202e' 
  AND token = '+tysF08JTLTyyk70BTBalabek51+nu79qpTD+bW3o8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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