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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '892d19b1452ec7982720f18e6bea11168aef40e3194b5bcdf349dc8744fa38e3' 
  AND token = '3T1MpQuZJIKi6YByjQ8CO67JaT1DsQm0v5Bqs4iAQew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00318

JSON explain

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