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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'd74dca02272492a026d396045353657e87fc1d5df13868585ba9e6bbb0819f11' 
  AND token = 'raWdwwsb3e24xvZeDIc8IwUH+em1JCkMx+eCAs4q0Ow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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