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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f85fb2e52860d49d057d7b01073319945dd9fcdad76274529f0d5162a9473f8c' 
  AND token = 'sNVz3IRPuqMOPKV17SU+yjkCqEnyPpexGHSs5W6SBFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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