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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '007e26f87d47b0085ecd695d1965af2c4ed91cdd770ca5b0bf031be0c470166d' 
  AND token = 'OoRo9XG/JOmY2hmV0oanAhEp0Utwlmid2rnggOhNFMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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