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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '0f49bdf2f7ddc5c0d3c2701edd1c7bdeff3fcb556413d44de7aea51b63dd7b7b' 
  AND token = 'pMR2gwcwS9NE2evLoRvatDgGk7R+WikC/rzWnIkJvek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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