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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e29fd42c3eddb28973e35a58a30ac74a69d5abc3d865a93a1eea8a69c97a2aae' 
  AND token = 'EtNeHvnlEk3DMEITLqj2UgR4DtFerzUMkNMRryE4aX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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