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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '80bd6fdc1413c3c2ec5b98ea498890bd0c19b66967d7eaa7732e81181393b1b0' 
  AND token = 'Mow0bxCeI1GRijCnDWpPd0cbC1/R7x9fghd+hx2Asmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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