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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'bbb0b521d420deb689a7dc2a2ab8e73ab70127e7c70ccfdc73767a4443ed8585' 
  AND token = '3FIDjO4dlCVEmA/HDChDtGMDgUBV1s6oxOqhQQiPQko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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