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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '610c117a32dcd977cecb78573e7bc03094ac8d708efacc1c5f05fa5771cde7bc' 
  AND token = 'CXvq5VQt9/dIviEq7R2m9bDmNpm77nxAZVb9nbIieNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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