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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01b5bddf8d1f215247ffbddae90c51745d1b35c2bcac95473759d65bfdd15653' 
  AND token = 'Xo+U8YsE4tITGTLt2VL8De+3fhBF8dnaSBRv4/z6DHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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