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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ab0f9b2e6112a2d3abb70308eba7460e325be13d7cd1beddc2027026de32672' 
  AND token = 'kyezVi7/WlnUC37VGrdnPK5SMK9bmPR+I0yF3cGAgfA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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