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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '0b7ceccab0af1efbd9d2aea584e1c6a06806d629166842b1ca9366ab7b553aa6' 
  AND token = 'FjPjNJ57sNphD97X1BaShDV98UAfGEBmhI3AJqCiHGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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