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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05d991c99448a877dd9b3d5ff59c0fb65446671079868669766ffc44f7539866' 
  AND token = 'dliJb5KVtLtPQS/rHYPMoqejocmIl7JEltX2vTrnxa8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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