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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2ef9ac0ddb253b80c07afd56a2a1311278f8c717b71ec6713a0500ae73b9697f' 
  AND token = 'KwO6DzOni0Nhf29CEvh7kQGHjJrqeuWrAOSWNLZKjIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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