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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '00082b2b3316070e2b2fbbe3bf2993c95aa7845799f3e153649c7d1ab8843f88' 
  AND token = 'sbGTHYHo+uzgxZ2nPiRMoybrrpY8d0WRffSY78IlLvk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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