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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05944f4b37e5d0d725583aefa3e0d2fa09adce664b69a42b051459df2b475231' 
  AND token = 'qWNX2lroho0TkIFHeyS4L6rc+Jq6a2f+cJX3kwclMOI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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