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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30a0e3ac99254290037ed6c9e92a41bc6b1b8623ed70c164f50be563246a4727' 
  AND token = '6c00cRx1B9trLesrumEmZtR50iXMvccc3We32BwiRRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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