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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32962a14598477a3b6157456896479e26bd47ddb1b4c79bda334b14d7b70d36d' 
  AND token = 'f1v2yMPEFncEemccIvQoq5TdzDBKPT3a6i2tlhBXsTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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