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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bc0722dbcfb2163b9fb8389d9aae4d13ebab037fb78328a0203a9a59564a88f6' 
  AND token = 'gBUMj/VMwReNZJxM6Q/3WEcI9ew7XJW27V+8ad4rchE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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