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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a97d43f30bca846eb2eea2b40daeca3d322920bb60a2ece7b4c4e0e2171f7bd' 
  AND token = 'zGAP/TGT+a2m2xRFtk6EpU24UzJTjIXKgsQGalKf0PM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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