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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1524aa725626bcd62c68a532291a8f791cc6571d3d298d168118bef889ea562f' 
  AND token = 'Tjd7+A/Tv4lWzIdHy60ZX4AZoWTdNEgHxr4TZjUkiu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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