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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04ebdc10d679af2db23c84c4d6853a62c6ddc0bcf2c811dff492c1ede29d2085' 
  AND token = 'PVPeOeCljmXS4l3LFQXrjl+SIc05el5EhLFfi7mmvIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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