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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62ddd936f21a0363865cba72879046d24e8a6d277c08578a24f3f6f05caa05d5' 
  AND token = 'hH8riwjvAI4kpH6ag7kHHhV6L5arfH7YF9Dj4pW3Sqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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