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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e82467253bea3527bfadefcbcf299142094a828289b21c8570004256151d301e' 
  AND token = '/WN6dv0wH1Kkm1d86Gf3nqRTCARl5jnGrYUpb+NYL5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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