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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '807c577244e760c245c475e5152d5f01cb89367a0018e6ce7f2a863f3b53364b' 
  AND token = 'YAl1Zbv4e24ksztmk5tj0gAC9gclymr1wRrebddUVPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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